This is a search and rescue technology I ran across recently.
It does not require batteries lasts forever and is something I feel all outdoor enthusiasts, hiker, fisherman/woman, hunter, skier, snowboarder etc should have on them.
If you were to get hurt or lost god forbid, this simple device can help locate you from a helicopter. I know there are satellite sos gps units phones but electronics need battery’s and reception.
Simply attach this tab to your pack and or use the belt that includes the reflector. The belt is actually the stretch type that is also good for waders.
I hike and fish alone most of the time. I think about that what “if” a lot more now that I’m in my 60s, really clumsy etc etc.. check it out.

https://recco.com/technology/